Cone crusher



Jan. 2, 1940. J w v 2,185528 CONE CRUSHER Filed Aug. 26, 1958 2Sheets-Sheet l John W St 61 9115 Patented Jan. 2, 1940 UNITED STATESCONE CRUSHER.

John W. Stevens, Salt Lake City, Utah, assignor to The EimcoCorporation, Salt Lake City,

Utah

Application August 26,

2 Claims.

My present invention relates to improvements in cone crushers orcrushing mills of the compound movement type in which is embodied afloating gyratory crusher head operating within an overhead concave forcrushing ores, rock, and other similar material. In carrying out myinvention I employ a compound rotary spindle having a lower journal thatis supported in bearings, an upper offset eccentric axle hereillustrated as obliquely disposed with relation to the lowerperpendicular journal of the spindle, and an intermediate hub anddriving member through which power is transmitted to the gyratory headthat is journaled on the upper axle portion of the spindle.

The gyratory head is thus suspended or mounted directly upon the axle oractuating portion of the spindle, and through the combined rotary andoscillating movement of the axle a compound movement is transmitted tothe head to cause its gyrations.

Because of this construction and arrangement of parts involving thecompound spindle, the construction and operation of the crushing mill ismaterially simplified; a minimum number of parts may be utilized tosecure a compact mill that occupies comparatively small space, and allparts of the mill are readily accessible so that the mill may be erectedstarting at the bottom thereof, and with equal facility the mill may bedismantled when necessary starting at the top of the mill and workingdownwardly.

By the combination and arrangement of parts dependent upon the operationof the compound spindle a very small power is required for the operationof the mill; a wider range of gyration in the crusher head is attained,and due to the smooth operation of the gyratory head the capacity of themill is increased, over similar cone crushers with which I am familiar.

The invention consists in certain novel combinations and arrangements ofparts involving the compound spindle and parts dependent upon itsoperation, as will hereinafter be more fully set forth. In theaccompanying drawings I have illustrated one complete example ofthe'physical embodiment of my invention wherein the parts are combinedand arranged about a compound spindle having a lower perpendicularjournal and an upper offset and obliquely disposed axle, but it will beunderstood that changes and alterations may be made in theseexemplifying structures, within the scope of my appended claims, withoutdeparting from the prinicples of my invention.

Figure 1 is a vertical transverse sectional view 1938, Serial No.226,913

through a crushing mill embodying my invention, showing also the drivingmechanism.

Figure 2 is a similar view of a fragment of the mill, showing therelation of parts when the spindle and the gyratory head have revolvedor 5 rotated through an angle of one hundred eighty degrees from theposition of Figure 1.

Figure 3 is a detail view of the compound spindle showing itsperpendicular journal, the obliquely disposed offset or eccentric axlefor 19 the crusher head, and the intermediate drivinghub of the spindle,the operating gear being omitted from the hub.

In the assembly view of Figure 1 I employ a main cylindrical frame Iupon which is mounted an internally threaded adjusting ring 2 that isfastened in place by bolts 2'.

Within the threaded adjusting ring is mounted V the cylindrical flangedbowl 3 that is exteriorly threaded for vertical adjustment in theadjust- 20 ing ring, and a series of set bolts or looking bolts 4 areemployed to lock the bowl in adjusted position. These bolts are threadedthrough holes in an upper exterior flange of the bowl and they passthrough clearance holes in the top of an enclosing open center cap 5,which encircles the bowl and rests upon the top of the adjusting flangedring 2.

Before adjusting the bowl the screws or bolts 4 are backed out of theflanged bowl to remove their heads from contact with the cap, then thebowl is turned in its threads to desired vertical adjustment, afterwhich the set bolts are turned home with their heads resting against thetop flange of the cap 5, to draw or jam the cap down tight on the top ofthe flanged ring and thereby retain the bowl against accidental turningmovement.

Within the open center of the flanged cap and also within the bowl ismounted a cylinder 6, 4 preferably of rolled plate, which forms a fixedfeed-sleeve that is suspended within the top of the bowl by an exteriorangle-ring 6' secured on the top of the flanged cap 5, and this sleeveprojects downwardly a considerable distance within the bowl as indicatedin Figure 1. An inverted frusto-conical hopper 1 is mounted with itsupper portion within the feed sleeve, and this hopper rests upon aseries of spaced interior radial webs 8 integral with the bowl andprojecting toward the center of the bowl. These webs are alsointegralwith an interior frusto-conical open center bearing flange 9 thatprojects upwardly and inwardly from the bottom rim of the bowl, and thefrusto-conical liner or concave l0 having an ho ardly flared bottom areait is mounted n the bearing flange 8 and fastened up against the flangeby bolts II which unite the webs 8 and lugs II of the concave throughlaminated saddles resting on the webs.

Material is fed to the feed-sleeve from an elevated feed-table l4adjustably supported on a suitable frame above the mill, and thefeed-table is fashioned with a central feed-spout I 4' which deliversthe material centrally of the top of the mill.

Dust seals are indicated at I! between the top of the bowl and thefeed-sleeve, and at l8 between the bottom edge of the bowl and thecylindrical main frame to prevent access of dust to the interior partsof the mill.

From this description in connection with the drawings it will beunderstood that the bowl with its concave or liner, and also its feedhopper I may be vertically adjusted with relation to the feed-sleeve andthe main frame, and also with relation to the adjustable feed-table andits feedspout I4.

For supporting the operating mechanism of the mill the main frame, atits lower portion is fashioned with a central interior cup-shapedbearing-box or housing N that is united with the main frame by means ofradial webs l8 spaced across the annular discharge space through whichthe crushed or flne material falls by gravity from the crushingelements, and preferably the upper edges of these webs or ribs aresharpened to prevent accumulation of material and to facilitate fallingof the crushed material into a receptacle located below the mill.

The upright compound spindle for the gyrating head is supported inbearings l8 and 20 of the bearing-housing, and as best seen in Figure 3the lower journal end 21 of the spindle is fashioned with a lowershoulder 22 for the lower bearing 19, and an intermediate circular diskor hub 24 having an under seat 25 for the inner race of bearing 20 alsoaids in supporting the spindle through its lower journal end 2|. The hub24, journal 2|, and its reduced bearing and 23 below the shoulder 22, itwill be noted, are circular and concentric with a perpendicular axialline or center line A-A in Figure 3, and a keyway is provided in theannular periphery of the hub for a key-point 26 between the hub and aflanged gear ring 21, which forms an operating gear that is rigidlyunited to and concentric with the perpendicular journal 2| of thespindle. This operating gear is rigidly mounted on the spindle with itsteeth projecting face downwardly within a gear-housing 28 integral withand flaring upwardly andoutwardly from the bearing-housing [1. Asindicated in Figure 1 a counter-weight 29 is fixed on the upper face ofthe operating gear for counterbalancing the compound spindle.

The upper portion of the spindle, above the hub and operating gear isfashioned with an axle 30 which terminates in a reduced bearing pin ii,and these parts, as indicated in Figure 3 by the axial line 3-3, aredisposed obliquely of and at a substantial angle to the perpendicularaxial line A--A of the spindle, to form an eccentric arrangement whichprovides for the gyratory or compound rotary movement of the crusherhead, which cooperates with the stationary concave to crush the ore,rock, or other material fed to the mfll.

The hollow gyratory crusher head, of frustoconical shape, is supportedon the spindle by means of spaced internal bearings 88 and 84, the

upper bearings 83 being interposed between journal end II of the spindleand the upper interior part of the hollow head; and the lower bearing 34is supported between the upper face of seat 35 of the hub and a lowerflange 28 of the head.

The four bearings of the spindle are thus compactly arranged in pairsabove and below the operating gear to provide a stable and substantialsupport for the spindle and to provide a similar support for thegyratory crusher head; and further the mounting of the gyratory headdirectly on the actuating axle permits transmission of power and motionto the gyratory head without reduction in the degree of movement. Inaddition, it will be. obvious that any reasonable degree of eccentricityand angular or oblique inclination of the axle may be employed to causevariations in the range of gyration of the crusher head, and such achange in spindles may be accomplished with facility, due to the readyaccessibility of parts of the mill.

On the outer periphery of the inner annular flange 36 of the hollowcrusher head an effective floating dust seal is provided through the useof loosely mounted bearing ring or seal 81 that gyrates with the crusherhead, and this floating bearing ring or seal ring is fashioned with alower bearing face that is spherical in shape. The spherical face of thebearing ring rests or floats upon a complementary upper face of a fixedbase-ring 38 that is rigidly mounted on the top of the gear housing 21.

An outer downwardly projecting annular bottom flange or skirt 89 of thehead extends over and encircles this floating sealed seat to deflectfalling crushed material and protect the seat from dust and debris.

Upon the exterior face of the hollow frustoconical head is mounted amantle 40, the face of which has an angularity differing in degree fromthe working face of the concave with which it cooperates, but, asindicated in Figures 1 and 2, the lower annular face I8 of the concavewhich flares outwardly from the main working face of the concave issubstantially parallel with that portion of the crusher head or themantle at the point of closest proximity of the parts when the head isgyrating. This arrangement of the crushing faces of the concave and themantle provide for a continuous passage, by gravity, of the material tobe crushed between the crushing elements of the mill, first, through agradually decreasing upper coarse-crushing zone, and then through alower dressing zone, and the finely crushed material then falls throughthe annular discharge space within the cylindrical frame of the mill.

The mantle is flrmly fastened on the top face of the crusher head bymeans readily accessible from the top of the mill, and for this purposethe mantle 40 in the shape of an open center truncated cone, is providedwith a retaining cap 4| that is slipped down over an adapted pin 42which, as shown, is threaded at both its upper and lower ends, and thecap rests on the top of the truncated mantle. The lower threaded end ofthe central adapted pin is threaded into an opening in the crown of thecrusher head, and a flanged clamp-sleeve or nut 48 is screwed on theupper threaded end of the adapted pin, and this nut or sleeve bears uponthe cap 4| to clamp the capand mantle down upon the crusher head.

For locking this clamp fastener in place the upper inner portion of thenut or sleeve 48 is fashioned hexagonal in shape, and a flat hexagonalkey 44, having a bottom rib 45 seated in a complementary diametricallyextending kerf in the top of the adapted pin is dropped into the sleeveafter the parts are clamped together. The ribbed hexagonal key, inco-action with the hexagonal inner portion of the nut, thus securelylocks the clamp device against turning. The key is, of course, removedin the event the mantle is to be removed and replaced.

To protect the clamp device, and also form a central feed-plateordistributing plate for the material that falls from the elevated feedspout M, a flanged plate 45 is bolted to an annular exterior flange atthe top of the clamp sleeve or nut 43, and as indicated by the relationof parts in Figure 1, the distributing plate, which gyrates with thecrusher head uniformly spills or distributes the material to the wallsof the tapered hopper from whence the material falls into the adit zoneof the crusher.

For rotating the compound spindle and thereby gyrating the crusher headthrough the use of the operating gear ring 21, I employ the horizontallyextending drive shaft 41, journaled in spaced bearings 48 and 49 withinthe shaft housing 50, which housing is rigid with the lower part of themain frame or cylindrical casing I, and a driving pinion 5| on the shaftmeshes with the operating gear for transmission of power.

A driving pulley 52 is mounted loosely on the shaft, but made rigidtherewith through the use of a safety-hub 53 that is keyed on the shaftand united with the pulley by means of a shear pin 54. As is well known,the shear pin will break under excessive pressure, as in the presence ofan uncrushable object that might otherwise jam the mill, and in the useof the safety device serious damage to the mill is avoided.

The operating parts of the mill are lubricated through the use of anoiling system indicated in Figure 1, which includes a supply or feedpipe 55 from a suitable source extended to the oil pump 56, which pumpis operated from the drive shaft by means of gears 51 and 58. Oil passesfrom the pump 56 through its discharge pipe 59 and supplies oil underpressure to the interior of the bearing housing I! for lubricatingvarious operating parts. As indicated by dotted lines in Figure 1 thespindle is fashioned with a longitudinally extending oil duct or passage60, through which oil flows to the upper part of the spindle and thencedown through the hollow crusher head for lubrication of the floatingseal, and other bearings, and an outlet or drain pipe 6| connected tothe gear casing 62 at the end of the shaft housing 50 disposes of theused oil in suitable manner.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent is:

1. In a gyratory crushing mill, the combination with a frame, aperpendicular spindle have ing an obliquely extending axle, a hollowcrusher-head mounted in bearings at the upper end of the axle, andbearings in said frame for the lower end of the spindle, of anintermediate hub integral with said spindle and axle and a gear ringrigid with the hub, a bearing between the frame and spindle and locatedbeneath the hub, a bearing between the hollow head and axle and locateddirectly over the hub, and a driving pinion journaled in the frame andlocated below and engaging with the gear ring.

2. In a gyratory crushing mill, the combination with a frame, aperpendicular spindle having an obliquely extending axle, a hollowcrusher head mounted in bearings at the upper end of the axle, bearingsin the frame for the lower end of the spindle, and an inner annularflange on the hollow crusher head, of an intermediate hub integral withthe axle and spindle and a gear ring rigid with the hub, a bearingbetween the frame and spindle located beneath the hub,

a bearing between the inner face of said flange and the axle and locateddirectly over the hub, a fixed base ring mounted on the frame exteriorof and above the gear ring, a gyratory friction ring mounted on theexterior face of the flange and bearing on the base ring, and a drivingpinion journaled in the frame beneath the gear ring.

JOHN W. STEVENS.

